The transonic flow past a cavity is encountered in various mechanical and aerospace problems. A sharp trailing edge from a rectangular cavity produces pressure pulses when impinged by a shear layer. Blunting the trailing edge sharpness reduces the discrete tone emanation. Here, two geometrical configurations are investigated. The base cavity dimension is [L/D] = 3.58 (length-To-depth ratio), and the freestream Mach number is M∞ = 0.8. Attenuation of the pressure pulses in the cavity with elliptic trailing edge is probed through direct numerical simulations coupled with BiGlobal stability analysis at a low Reynolds number (ReD = 1000) and limited experiments at a high Reynolds number (ReD = 3 × 105).
On the change in flow dynamics of a transonic open cavity with trailing edge modifications
Auteri F.;
2024-01-01
Abstract
The transonic flow past a cavity is encountered in various mechanical and aerospace problems. A sharp trailing edge from a rectangular cavity produces pressure pulses when impinged by a shear layer. Blunting the trailing edge sharpness reduces the discrete tone emanation. Here, two geometrical configurations are investigated. The base cavity dimension is [L/D] = 3.58 (length-To-depth ratio), and the freestream Mach number is M∞ = 0.8. Attenuation of the pressure pulses in the cavity with elliptic trailing edge is probed through direct numerical simulations coupled with BiGlobal stability analysis at a low Reynolds number (ReD = 1000) and limited experiments at a high Reynolds number (ReD = 3 × 105).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
